2.4.1.359	A333D	site-directed mutagenesis	-, 749701	
2.4.1.359	Q336A	2.6% residual activity	-, 749701	
2.4.1.359	Q336A	site-directed mutagenesis	-, 749701	
2.4.1.359	Y194A	2.7% residual activity	-, 749701	
2.4.1.359	Y196A	site-directed mutagenesis	-, 749701